The FAQ about Substitute Alkali (Production Practice)
The FAQ about Substitute Alkali (Production Practice) 1.Which kinds of fabric can be dyed in substitute alkali? And which color can be dyed into? Answer: it can be used for dyeing cotton fabric. And it can be used to dye any color of the cotton fabric. 2.How can we do if the discoloration has appeared on the fabric when we dye using substitute alkali? Answer: The reasons for discoloration is various. And the following three aspects can be used in checking alkali. Firstly: Check the weight of the substitute is proper or not. The substitute is high concentration alkali . If there is a mistake on the fabric, the discoloration will occur. Secondly: check the holding times is enough or not. In general conditions, the holding time for bright color fabric is about 45 mins. And 60-70 mins for dark color. If the hold time is not enough, the dyes will not be fixed completely. After soaping, the color will become light than expected. Thirdly: Check the adding of sodium carbonate...